I basically didn't study biology thanks to this game. The teacher was rather upset that my revision method was killing monsters with guns in NYC. This was back in the day when games were actually educational, kids!
The ending... oh my, it was the only time an ending made me really really scared. I suppose the turn-based action is not something younger players are used to now, but it is rather nice to get time to decide when or how to attack the enemies. Instead of doing ninja moves that make me go dizzy.